An isosceles right triangle, the bottom is 10cm, find its area
It is known that: △ BAC is an isosceles right triangle, and the bottom edge is BC = 10cm. Calculate the area. If the vertical line Ao of the bottom edge BC is made along vertex a, then ∠ boa = 90 °, Bo = OC = BC △ 2 = 5cm ∵ △ BAC is an isosceles right triangle ∵ ABO = 45 °∵ Bao = 180 ° - 90 ° - 45 ° = 45 ° ∵ △ boa is an isosceles right triangle ∵ Bo = Ao = 5cms
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