Question

Please help thank you very much.

Answer 1

The first one is true




if the angles of a right triangle are 90,45,45

the legs are equal. so if AC is 13, Back will be 13, too.


now you can get help from Pythagoras theorem :
$c {}^{2} = {13}^{2} + {13}^{2} \\ c {}^{2} = 169 + 169 = 338 \\ c = \sqrt{338} = 13 \sqrt{2} = 18.38$




good luck

Answer 2

Hello!

We first have to find the missing angle in the triangle

180 - 90 - 45 = 45

Since angle b and angle c equal the same their corresponding lines equal the same

Line BA = 13

Use the Pythagorean theorem

$13^{2} + 13^{2} = c^{2}$

Square the numbers

$169+169 = c^{2}$

Add

$338 = c^{2}$

Take the square root of both sides

$c = 13 \sqrt{2}$

The answer is A) $13 \sqrt{2} ft$

Hope this helps!