5 squared + B squared = 13 squared Solve the equation from part B until you have the squared variable for the missing side length on one side of the equal sign and a rational number on the other.

5² + B² = 13²

B² = 13² - 5²

B² = 144 (This is the part where you have the squared variable for the missing side length on one side of the equal sign and a rational number on the other.)

B = 12

b = 12

Step-by-step explanation:

Subtract 25 from both sides

Square root both sides

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true

d 600 because 15*10*2=300

300+300=600

step-by-step explanation: