Question

in the figure below, m∠wxz = 100°, and m∠2 is three times m∠1. find m∠1.

Explanation:

Step1: Set up an equation

Let $m\angle1 = x$. Then $m\angle2=3x$. Since $m\angle WXZ=m\angle1 + m\angle2$ and $m\angle WXZ = 100^{\circ}$, we have the equation $x + 3x=100^{\circ}$.

Step2: Combine like - terms

Combining the left - hand side of the equation $x + 3x$, we get $4x = 100^{\circ}$.

Step3: Solve for x

Divide both sides of the equation $4x = 100^{\circ}$ by 4. So $x=\frac{100^{\circ}}{4}=25^{\circ}$.

Answer:

$25$