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(a-30)°and (2a)° are themeasures of two supplemen-tary angles. find the measureof each angles |
Answer» Answer:-40° and 140° Step-by-step explanation: a-30° and 2A° are two supplementary angles. As we KNOW that the sum of two supplementary anges is equal to 180* THEREFORE, a-30° + 2a° = 180° a-30 + 2a = 180 3a - 30 = 180 3a = 180 + 30 3a = 210 a = 210 ÷ 3 a = 70 → 1st angle (a-30) = 70 - 30 = 40° → 2nd angle (2a) = 2 x 70 = 140° |
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