Area of the right-triangle is equal to:
(a) base x height (b) 2(base x height)
(c) base x height (d)-(base + height)
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Drag the dot to the right. The reason they have you do this, is so that you can remember the formula. Think of the formula for finding the area of a triangle: Area = Base times Height times ½. Then if you take a copy of the triangle and move above the other triangle, it makes a rectangle! Now remember the formula for the area of a parallelogram: Area = Base times Height. So the area you want to find is only half of the square, so you only want half of what you get when you multiply the base and the height. So take the height (5) and the base(6) and multiply. You get 30. Now take ½ of 30. Your answer will be 15 units². 5*6=30 ½*30=15 15 units²
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