Question

1. the triangles below are similar. find the value of x. round your answers to the nearest whole number. a. 62 c. 54 b. 31 d. 57

Explanation:

Step1: Set up proportion

Since the triangles are similar, the ratios of corresponding sides are equal. So we have $\frac{x}{18}=\frac{21}{7}$.

Step2: Solve for x

Cross - multiply: $7x = 18\times21$. Then $7x=378$. Divide both sides by 7: $x=\frac{378}{7}=54$.

Answer:

c. 54