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How many pairs of parallel lines does a square have?

Other examples of parallelograms are rectangles and rhombi. A rectangle has two pairs of parallel sides that meet at 90 degree angles, and a rhombus has two pairs of parallel sides that are equal in length. A square is a type of rectangle and rhombus since it meets both their criteria.

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How do you graph a circle?

Convert the equation to standard formFor example, assume you have the equation x^2 + y^2 - 12x - 4y + 36 = 0. To complete the square, group like terms together in their own parenthesis, halve the coefficents, and square them to yield the final terms of the squares. In the example, this is (x^2 - 12x + 36) + (y^2 - 4y + 4) = -36. Add both the terms you just found to the right side of the equation, giving you 4. Converted to standard form, the equation is (x - 6)^2 + (y - 2)^2 = 4.Place the center of the circle at the point provided, and find the radiusIn the equation, (h, k) is (6, 2). Place a ..

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What is a quadrangle with one right angle?

The types of quadrangles that have special names are rectangles, parallelograms, rhombuses, squares, trapezoids and kites. Quadrangles must have interior angles that total 360 degrees. A rectangle has four right angles, and each angle is 90 degrees. A parallelogram does not necessarily have right angles, but opposite angles need to be equal, similar to the rhombus. An isosceles trapezoid has equal angles that come from parallel sides. A kite has equal angles where the two pairs of sides intersect.

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How do I calculate truss angles?

Measure the height or the vertical distance from the apex to the base. Next, calculate the angle of the truss's lower corner. This angle derives from the base and one of the sloping edges. Use the trigonometric function of inverse tangent to find this angle. The tangent is the opposite edge divided by the adjacent angle.\nSymmetrical trusses have equal base angles. If the trusses are not symmetrical, find the left-side base angle to produce the right-side base angle.\nThe truss's top angle derives from 180 degrees minus the two base angles. The sum of angles within a triangle always ..

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How do you calculate the median of a set of numbers?

Put the set in order from least to greatestOrder the values in the set from least to greatest by putting the smallest value first and arranging the values so that each following value is greater than the previous one. For example, if your set consists of the scores on a particular test with the values of 100, 95, 90, 92, 81, 84, 74, 33, 45, 50, 67, and 79, then set them in order from least to greatest: 33, 45, 50, 67, 74, 79, 81, 84, 90, 92, 95, 100. Find the middle numberIf there is an odd number of values, locate the middle number. This is the median. In the example from Step 1, there is an..

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How do you convert a mixed number to its simplest form?

A proper fraction is a fraction that has a lower number in the numerator and a higher number in denominator, such as the fraction three-fourths. An improper fraction is the inverse of this, which entails the higher number in numerator and lower number in the denominator, like 5/3. A mixed number is a whole number with a fraction, such as 1 3/4.\nTo convert the mixed number 1 3/4, one has to multiply the denominator 4 by the whole number 1 that gives 4, add this 4 to the 3 in the numerator to get 7 and place 7 over the denominator to find the improper fraction 7/4. In this case, this is the l..

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What is the antiderivative of cos?

The cosine function, cos(x), is defined as the ratio between the adjacent and hypotenuse edges of a right-angled triangle that includes the angle x. The cosine function is a periodic function that is the derivative of the periodic function sin(x), which is defined as the ratio between the opposite and hypotenuse edges of the triangle containing angle x.

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What are irregular shapes?

Shapes like squares and equilateral triangles are considered regular shapes because they have predictably identical sides and angles. If a person were to take an equilateral triangle and make each of the sides different lengths and change the size of each angle, the regular-shaped triangle would turn into an irregular shape. Irregular shapes do not have to look messy or weird, though; a shape that resembles a rectangle with a chunk cut out of it can be considered irregular, even though it is composed of straight lines and has a neat and orderly appearance.

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What is the perimeter of a 4 foot square?

All four sides of a square are equal, so in the case of a 4-foot square, the problem would be written out as 4+4+4+4=16. The formula is also the same for calculating the perimeter of a rectangle, with the main difference being two sides of a rectangle are longer. So, for example, if a rectangle was 4 feet by 6 feet, its perimeter would be 20 feet. The problem would be written as 4+4+6+6=20. To calculate the perimeter of any polygon, measure the length of each outer line, and add the numbers together to determine the perimeter.

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How do you calculate the length of a stair stringer?

Once you have found these measurements, multiply the riser measurement by itself and the tread measurement by itself, and add these two numbers. Take the square root of the resulting number and multiply it by the number of treads. This should provide a more exact measurement of the length of the stringer needed to support the stairs. Check building codes in your area to make sure of the maximum riser height and the minimum tread width.

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