Question

$find \: the \: unknown \: letterd \: angle \:$
(i) 50° and 70° and x (ii)65° and 65° and a (iii)x and x and x (iv)50° and 70° and x​

Answer 1

Answer:

i. x=60

ii. a=50

iii. x=60

iv. x=60

Step-by-step explanation:

$i.(50 + 70 + x ) = 180 \\ 120 + x = 180 \\ x = 60$

$ii.(65 + 65 + a) = 180\\ 130 + a = 180 \\ a = 50$

$iii.(x + x + x) = 180 \\ 3x = 180 \\ x = 60$

$iv.(50 + 70 + x) = 360 \\ 120 + x = 180 \\ x = 60$