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Best answer

A) 1:2:3 - Let these angles equal x, 2x & 3x.

By angle sum property of a triangle,

x+2x+3x = **6x** = 180.

So, x = 30 & 2x =60 & *3x =*** 90. **Hence, it is the ratio of angles in a right-angled triangle.

B) 1:1:2 - Let these angles equal x, x & 2x.

By angle sum property of a triangle,

x+x+2x = 4**x** = 180.

So, x = 45 & x =45 & 2*x =*** 90. **Hence, it is the ratio of angles in a right-angled triangle.

C) 1:3:6 - Let these angles equal x, 3x & 6x.

By angle sum property of a triangle,

x+3x+6x = 10**x** = 180.

So, x = 18 & 3x =54 & 6** x =** 108

**Option C is the Correct Answer.**