A triangle has sides 5 cm, 6 cm and 7 cm. Find its largest angle, to 1 decimal place.
Answer and explanation
Correct answer: C.
- Step 1: The largest angle is opposite the longest side, 7 cm.
- Step 2: .
- Step 3: .
Answer
.
Why not the others: : this is the angle opposite the 6 cm side. : this is the angle opposite the 5 cm side. : this is minus the correct angle.
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