If a triangle has angles 135⁰,15⁰,30^o.Is it an ibtuse triangle? YES NO

If a triangel has angels 90⁰, 60⁰,30⁰. Is it a right angel triangel? YES No

If a triangel has angles 25⁰, 75⁰,80⁰. Is it an acuate triangel? YES NO

If a triangel has 2 angels of 75⁰. What is the measure of third angle in degree? 25 30 15

The perimeter of an equilateral triangel is 15cm. What is the lenght of one side? 15CM 45CM 45CM