From personal advice to professional guidance, IDNLearn.com has the answers you seek. Ask your questions and receive prompt, detailed answers from our experienced and knowledgeable community members.
1. Use the Pythagorean Theorem since this is a right triangle:
a^2 + b^2 = c^2
4^2 + b^2 = 9^2
b^2 = 9^2 - 4^2
b = √ 65
b = 8
answer : 8