Question

Can someone please help me with just these two thanks I will give a brainliest to the correct answers

Answer 1

Answer:

7. $c = 15.81$

8. $b = 16$

Step-by-step explanation:

Required

Determine the third sides

(7): We have

$b = 5$

$a = 15$

$c=??$

To find c, we make use of Pythagoras theorem

$c^2 = a^2 + b^2$

$c^2 = 5^2 + 15^2$

$c^2 = 250$

$c = \sqrt{250$

$c = 15.81$

(8): We have

$c = 20$

$a = 12$

$b = ??$

To find c, we make use of Pythagoras theorem

$c^2 = a^2 + b^2$

$20^2 = 12^2 + b^2$

$400 = 144 + b^2$

$b^2 = 400 - 144$

$b^2 = 256$

$b = \sqrt{256$

$b = 16$