In this lesson we’ll look at how to find the area of a triangle, which is equivalent to half of the product of the base and the height, A=(1/2)bh. The area is always in units of length^2 (“length squared”).
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The isosceles triangle theorem says that if two sides of a triangle are congruent, then its base angles are congruent. The base angles are the angles that touch the non-congruent leg. If we know that a triangle has two congruent sides, then we know it’s isosceles, and if we know that two interior angles are congruent, then we know the triangle is isosceles.
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