All three angles in a triangle must add to what: 180 degrees. On a scale drawing, the height of a tree is 5.75 inches. If the scale of the drawing is 1 in: 30 ft, how tall is the tree: 172.5 ft. Suppose the diameter of a circle is 24 inches. What is the radius: 12 inches. What size angle in degrees would be supplementary to a 100 degree angle: 80 degrees. What size angle in degrees would be complementary to a 35 degree angle? : 55 degrees. A geologist drew a scale drawing of a section of a quartz layer she saw in a cliff. The scale drawing of the layer is 2 in. high and 8 in. long. If the actual layer is 3 ft. high, what is the length of the actual quartz layer section she saw: 12 ft. Which of these sets of lengths could make a triangle? Choose all that apply: 12 in, 15 in, 5 in. What shape do you get when you cut a cylinder perpendicular to the base: rectangle. What shape do you get when you cut a cylinder parallel to the base: circle. What shape do you get when you cut a cube perpendicular to the base: square. What shape do you get when you cut a rectangular pyramid perpendicular to the base: triangle. What shape do you get when you cut a rectangular pyramid parallel to the base: rectangle. How much fabric will you need to cover the foam cube: 24 in2. What is the volume of this cube: 8 in3