Question

Can somebody help me with this please!

Answer 1

x=80 deg

Explanation:

It is known that the sum of the 3 angles of a triangle is equivalent to 180 deg (As the Triangle Sum Thm states). Therefore:

70+30+x=180

100+x=180

Subtract 100 from both sides to get x on one side, by itself:

100-100+x=180-100

Solve:

x=80 deg

Answer 2

80 degrees

Explanation:

the sides add upp to 180 degrees so 180-70-30=80