Find the degree measures of unknown angles in a right-angled triangle if one acute angle is 3.5 times the second.

univerkov | December 3, 2020 | education

let one angle be x °, then the second is 3.5x °, and the third is 90 ° (by conv). their sum is 180
x + 3.5x + 90 = 180
4.5x = 90
x = 20 ° first angle
20 * 3.5 = 70 ° second angle
Answer: 90 °, 70 °, 20 °

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