Question

19. If the measures of two angles of a triangle are 60' and 40", find the measure
of the third angle.​

Answer 1

Answer:

a triangle has a 180°

using angle sum property of triangle

60 + 40 +X = 180

100+ X = 180°

X = 180-100

X = 80°

Step-by-step explanation:

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Answer 2

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60°+40°+x=180°. [Angle Sum Property]

100°+x=180°

x=180°-100°

x=80°