Exploring Triangles

What are the three types of triangles based on side lengths?

• Square, Rectangle, Parallelogram

• Right-angled, Obtuse, Acute

• Equilateral, Isosceles, Scalene

• Hexagon, Pentagon, Octagon

What is the name of a triangle with all sides equal?

• Right triangle

• Equilateral triangle

• Isosceles triangle

• Scalene triangle

How many degrees are in the sum of the angles of a triangle?

• 120 degrees

• 360 degrees

• 180 degrees

• 90 degrees

What type of triangle has one angle greater than 90 degrees?

• Right triangle

• Obtuse triangle

• Scalene triangle

• Acute triangle

What is the formula to calculate the area of a triangle?

• Area = base + height

• Area = base * height / 2

• Area = 1/2 * base * height

• Area = base * height

If a triangle has a base of 10 cm and a height of 5 cm, what is its area?

• 30 cm²

• 15 cm²

• 20 cm²

• 25 cm²

What do you call a triangle with one angle equal to 90 degrees?

• Acute triangle

• Right triangle

• Scalene triangle

• Obtuse triangle

What is the longest side of a right triangle called?

• hypotenuse

• base

• altitude

• perpendicular

How can you determine if a triangle is equilateral?

• All three sides are equal in length.

• At least one side is longer than the others.

• The angles must all be 90 degrees.

• Two sides are equal in length.

What is the relationship between the lengths of the sides of a triangle called?

• Triangle inequality theorem

• Angle bisector theorem

• Congruence postulate

• Pythagorean theorem