An isosceles triangle has two equal angles. If one angle measures 140°, then the other two angles must have equal measures. The sum of all the angle measures in a triangle is 180°, so the sum of the other two angles is (180° - 140°) = 40°.
Therefore, the other two angles could both measure 20° each, or they could both measure 40° each.
Hence, the possible measures for the other two angles are 20° and 40°.
An isosceles triangle has an angle that measures 140°. What measures are possible for the other two angles? Choose all that apply.
3 answers
40 isnt there
Apologies for the mistake. You are correct, the other two angles cannot both measure 40°. If one angle measures 140°, the other two angles of an isosceles triangle must have equal measures. Since the sum of all the angle measures in a triangle is 180°, the sum of the other two angles must be (180° - 140°) = 40°.
Therefore, the only measure that is possible for the other two angles is 20° each.
Hence, the possible measure for the other two angles is 20°.
Therefore, the only measure that is possible for the other two angles is 20° each.
Hence, the possible measure for the other two angles is 20°.