Geometry Basics

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What is the sum of the angles in a triangle?

180 degrees.

What is a four-sided shape called?

Quadrilateral.

What do you call a triangle with all sides of equal length?

Equilateral triangle.

What is the name of a polygon with eight sides?

Octagon.

What do you call a straight path that extends infinitely in both directions?

A line.

What is the perimeter of a square with side length 5?

20 units.

What is the formula for the area of a rectangle?

Length × Width.

What do we call a line segment that joins two points on a circle?

A chord.

What is a shape with all sides and angles equal called?

A regular polygon.

If a rectangle is 4 units long and 3 units wide, what is its area?

12 square units.

What is a triangle with one right angle called?

Right triangle.

What is the term for a closed shape with no sides that are equal and no angles that are equal?

A scalene triangle.

What is the radius of a circle if its diameter is 10?

5 units.

What is pi approximately equal to?

3.14.

What geometric shape has opposite sides that are equal and parallel?

A parallelogram.




Test Your Knowledge

Select the correct option


1. What do you call a triangle with all sides of equal length?

Equilateral triangle.

Scalene triangle.

Isosceles triangle.

Right triangle.

2. What is the name of a polygon with eight sides?

Hexagon.

Octagon.

Decagon.

Pentagon.

3. What is a four-sided shape called?

Quadrilateral.

Pyramid.

Rectangle.

Parallelogram.

4. What is the sum of the angles in a triangle?

180 degrees.

90 degrees.

360 degrees.

270 degrees.

5. What do you call a straight path that extends infinitely in both directions?

A line.

A ray.

A segment.

A vector.

6. What geometric shape has opposite sides that are equal and parallel?

Trapezoid.

A parallelogram.

Rhombus.

Kite.

7. What do we call a line segment that joins two points on a circle?

A diameter.

A radius.

A chord.

A tangent.

8. What is a shape with all sides and angles equal called?

An irregular polygon.

A regular polygon.

An ellipse.

A symmetric shape.

9. What is a triangle with one right angle called?

Acute triangle.

Obtuse triangle.

Scalene triangle.

Right triangle.

10. What is the radius of a circle if its diameter is 10?

20 units.

5 units.

10 units.

15 units.