Question

please solve this two questions please fast​

Answer 1

Step-by-step explanation:

1) 102° + 70 ° + x =180°

x= 180 - 172

x = 8°

So, the unknown angle is 8°

2) a² = b² + c²

= 13² =5² + c²

=c² =13² - 5²

=c²=169 - 25

=c² = 144

=c = square root 144

=C= 12

So, third side is 12.

Thank you

Answer 2

Answer:

1. 50 °

2. 12

Step-by-step explanation:

1. 70°+x=120° (Exterior angle is equal to sum of two opposite angles.)

x=120°-70°

x=50°

2. (AC)^2+(CB)^2=(AB)^2

(5)^2+(CB)^2=(13)^2

25+(CB)^2=169

(CB)^2=169-25

(CB)^2=144

CB=_/144

CB=12