Question

How can the area of this triangle be determined by forming a rectangle?

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Copy and rotate the triangle and place it next to the existing triangle to form a rectangle. The length of the rectangle is units. The width of the rectangle is units. The area of the rectangle is square units.

The area of the triangle is half the area of the rectangle, so the area of the triangle is square units.

Answer 1

Use Pythagorean theorem

Explanation:

multiply legth squared plus width squared of the base square root the number you just got. take the other side length square root that and the number you got from last answer squared then square root it then you have your numbers