Is Triangle?

Enter three angles and check if they make a traingle.

Find hypotenuse

Length of Hypotenuse = sqrt(base² + perpendicular²)

Area of a triangle = 1/2(Base * Height)

Test your knowledge on Triangles

1. What is the third angle for the triangle where angle1 = 45° and angle2 = 45°?

45^o

60^o

90^o

2. If a triangle has an angle of 90 degrees, what is it called?

obtuse

acute

right-angled

3.There is a right triangle PQR where: angle Q = 90°; angle P = angle R. What is the measure of angles P and R?

85^o

65^o

45^o

4.Which of the following triangles are always similar?

Equilateral triangle

Isosceles triangle

5.A triangle can have

one right angle

two right angles

6.A scalene triangle has ___ lines of symmetry

two