One of the acute corners of a right-angled triangle is 18 degrees. find another sharp corner of it.
| September 6, 2021 | education
A rectangular triangle is a triangle in which one of the corners is a straight line (equal to 90º).
The sum of all the angles of the triangle is 180º. Since one of the angles (∠С) of this triangle is 90º, and one of the acute angles (∠А) is 18º, then to calculate another acute angle, you need to find the difference between the sum of the angles and degree measures of the angles ∠А and ∠С:
∠В = 180º – 90º – 18º = 72º.
Answer: the other acute angle is 72º.
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