In triangle ABC, angle A = 40, angle B = 70. Find C.
| April 8, 2021 | education
angle A = 40 °.
angle В = 70о.
angle С -?.
If we take into account that the sum of all angles in the triangle ABC = 180 °, then in order to find what the angle C is equal to, you need to subtract the sum of two known angles from 180 °.
We get the following example:
180o – (40o + 70o).
40o + 70o = 110o.
180o – 110o = 70o.
Means,
180o – (40o + 70o) = 70o.
Answer: angle C = 70 °.
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