Two angles whose measurements add up to 90º.Ī solid figure with a single circular base and a round, smooth face that diminishes to a single point.Īngles of separate figures that are in the same position within each figure. The distance around a circle, calculated by the formula \(C = \pi d\). The amount of space inside a two-dimensional shape, measured in square units. In surface area questions, we need to know all three side lengths of the triangle however we only need the base and the height to calculate the area of the triangle.^3\).Ī figure formed by the joining of two rays with a common endpoint. You use the formula for the area of a triangle which is 1 2bh 1 2 b h.
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