Question

7. In the given figure, Z1 = 2x - 10° and Z2 = 3x + 20°, find x and hence 21 and 22.
А
2
B​

Answer 1

Answer:angle aoc +angle BOC =180...linear pair

(2x-10)+(3x+20)=180

5x+10=180

5x=170

x=34

angle aoc =2*34-10

angle BOC =3*34 +20

The figure will be as shown,

Given, angle AOC = (2x - 10°) and angle BOC = (3x + 20°) also, AOB is a straight line.

The sum of two angles on a straight line is 180° .

As, AOB is a straight line ;

=> angle AOC + angle BOC = 180°

=> (2x-10) + (3x+20) = 180

=> 2x - 10 + 3x + 20 = 180

=> 5x + 10 = 180

=> 5x = 180 - 10

=> 5x = 170

=> x = 170/5

=> x = 34 Answer.

Explanation:

Answer 2

Answer:

hope it helps

Explanation:

angle aoc +angle BOC =180...linear pair

(2x-10)+(3x+20)=180

5x+10=180

5x=170

x=34

angle aoc =2*34-10

angle BOC =3*34 +20