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A triangle is isosceles with sides 3 cm, 8 cm and $x$ cm, where $x$ is one of the two given lengths. What is $x$ ?

Class 7Triangle InequalityTriangles

A11
B3
C5
D8

Step-by-Step Solution

If

x = 3

: sides 3, 3, 8 and 3 + 3 = 6 < 8, impossible. If

x = 8

: sides 3, 8, 8 and 3 + 8 > 8 ✓. So

x = 8

.

Answer: D) 8

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