Question

a triangle123 is right angled at 90 degreee why​

Answer 1

Answer:

Correct option is A)

△ ABC is a right-angled triangle.

By Pythagoras theorem,

AC

2

=BC

2

+AB

2

⇒13

2

=5

2

+AB

2

⇒AB

2

=−(5)

2

+13

2

⇒AB

2

=−25+169

⇒AB

2

=144

⇒AB=

144

⇒AB=12 cm.

solution

Answer 2

Answer:

Explanation:

Perpendicular lines, or straight lines that intersect each other at a 90-degree angle, create right angles

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