Question

Two angles of a triangle are 70 and 20, find the third angle and tell what kind of triangle it is
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Answer 1

Answer:

the other angle is 90

this triangle is right angle triangle

Answer 2

using angle sum property

let third angle be x

$70 + 20 + x = 180$

$90 + x = 180$

$x = 180 - 90$

$x = 90$

therefore third angle be 90°

and it is right angled triangle