Question

I need a help
prove that the triangle must have at least two acute angles?

Answer 1

There are 3 types of angles-

acute= less than 90
right= equal to 90
obtuse= greater than 90

there is a rule that the sum of all 3 angles of a triangke are always 180 degree.

If we keep two obtuse angles, For ex-

91+91=182

it will contradict that rule.

If we keep 2 right angles,

90+90=180

then it will also contradict the rule.

therefore there must be 2 acute angles in a triangle.

Answer 2

Answer:

Total Deegre of Triangle = 180°

Hope it will be helpful ✌️