The missing side of ABC = 13
The missing side of FDE = 24
Pythagorean Theorem: a² + b² = c²
Pythagorean Theorem is for right-angled triangle only.
The missing side of ABC is:
12² + 5² = AC²
169 = AC²
AC = √169
AC = 13
The missing side of FDE is:
DE² + 10² = 26²
DE² = 26² - 10²
DE² = 576
DE = √576
DE = 24