What is the formula to find if 2 lengths form a triangle

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

Write an introductory paragraph for this corrie ten boom and her family were faced with some difficult choices after hitler came to power. some family members paid the ultimate price. write a carefully thought-out paper of at least 200 words dealing with the following concepts: --how should a christian act when evil is in power? --what do you think it would be like to live in an occupied country? remember to proofread anything you write thoroughly.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'