Mathematics

Question

Explain please thanks
Explain please thanks

1 Answer

  • all the angles inside a triangle add up to 180°.

    (2x + 15) + (5x + 5) + x = 180
    8x + 20 = 180
    8x = 180 - 20
    8x = 160
    x = 160/8
    x = 20
    the question is asking what angle B is,
    B = 2(20) + 15
    B = 40 + 15
    B = 55°