![]() ![]() Therefore, if we subtract the two given angles from 180°, the result will be the missing angle.ĥ. The sum of the angles of a triangle is 180°. For instance, the length of the shorter missing side is 6 because if you add it to the 3 on the left, the result should be the 9 on the right.įinally, add the side lengths together to find the perimeter.Ĥ. Start by filling in the missing lengths of the sides. To find the perimeter of a polygon, add the lengths of its sides. The perimeter of a figure is the length around it. Now substitute this value into the area formula and calculate the area.ģ. The problem provides the diameter of the circle, which is twice the radius. The area of a circle is given by the formula A = 2, where r is the radius of the circle. Therefore, the smallest side is half the length of the hypotenuse, so its length is. In other words, the length of the longer leg is times the length of the shorter leg, and the hypotenuse is twice the length of the shorter leg. In a 30-60-90 triangle, the ratio of the lengths of the sides is 1: :2. The figure below is an equilateral triangle with sides of length 6. Which of the following could be the side lengths of a right triangle?ġ0. The figure below is a parallelogram with two angles given in terms of x. What is the sum of the measures of the interior angles of a hexagon?Ĩ. Find the measure of the missing angle in the triangle below.ĥ. The figure below contains only horizontal and vertical lines.
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