### Home > A2C > Chapter 2 > Lesson 2.1.4 > Problem2-52

2-52.

Find $m∠a$ in the diagram below.

The coordinate of the point gives the leg lengths of the triangle.

Use tangent to find the angle.

$\text{tan}(a)=\frac{8}{5}$

Solve.

$m∠a = 57.99°$