Question

Please help!!

Answer 1

Look at ∠A, the angle which resides on (1, 3). If we count 5 units down, you find the other endpoint on side AC. Hence, the length of side AC is 5 units. This figure is equal to the height of the graphed triangle.

If we mirror this process with the figure representing the triangle's length, side BC, we get 4 units.

The formula for calculating a triangle's area is $\frac{1}{2}bh$. In this context, the base of the triangle is the same as the length. Now, let's plug in the base and the height.

$\frac{1}{2}(4)$ × $(5) = 10$

The area of triangle ABC is 10 squared units.