In triangle ABC, angle C is 90, AB = 8, angle A = 30. Find BC.
| May 1, 2021 | education
Given: ABC – rectangle. treug .;
C = 90 °; A = 30;
AB = 8;
BC -?
It is known that in a right-angled triangle a leg lying opposite an angle of 30 ° is equal to half of the hypotenuse.
In a given triangle AB is the hypotenuse, BC is the leg against the angle A = 30 °. So BC = AB / 2 = 8: 2 = 4.
Answer: BC = 4.
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