Three sides of a triangle are 6 cm, 12 cm and 13 cm then
all three angles are acute
one angle is a right angle and others acute
one angle is obtuse, one acute and one right angle
one angle is obtuse and others acute
A
one angle is obtuse, one acute and one right angle
B
one angle is obtuse and others acute
C
all three angles are acute
D
one angle is a right angle and others acute
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Solution
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We know that,
longest side² < other side² + other side² then is acute.
The sides of the triangle are 6 cm, 12 cm and 13 cm. Since, 132<62+122 Thus, the triangle is an acute angled triangle.
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