THE MEASURE OF ONE OF THE ACUTE ANGLES OF A RIGHT-ANGLED TRIANGLE
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Given in a right angle triangle one angle exceeds other by 20
o
.
∠B=∠C+20
∠A+∠B+∠C=180
o
∠B+∠C=180−90=90
o
2∠C=90−20=70
[∠C=35
o
]
& [∠B=55
o
].
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