Question

Can someone help me with these!

Answer 1

1. 13

2. 18

3. 7

4. 12

Explanation:

Well, the total of angles in the triangle should equal to 180

1. (8x - 35) + (6x - 5) + (3x - 1) = 180

⇔ x =
`(180+1+5+35)/(8+6+3)`

⇔ x = 13

2. (5x - 11) + (2x + 20) + [180 - (11x - 63)] = 180

⇔ x =
`(180+11-20-180-63)/(5+2-11)`

⇔ x = 18

3. It's Equilateral Triangle.

(9x - 3) =
`(180)/(3)`

⇔ x = 7

4. It's Isosceles triangle.

(8x - 23) =
`(180 - 34)/(2)`

⇔x =
`(73+23)/(8)`

⇔x = 12