Quiz on Identifying 2D Shapes

📐 Quick Study Guide

• 🟩 Square: 4 equal sides, 4 right angles. All sides are congruent.
• 🔴 Circle: A round shape with no corners or edges. Defined by its radius and diameter.
• 📐 Triangle: A polygon with 3 sides and 3 angles. The sum of its angles is 180 degrees.
• 🔷 Rectangle: 4 sides, 4 right angles. Opposite sides are equal in length.
• 🔶 Rhombus: 4 equal sides, opposite angles are equal. Diagonals bisect each other at right angles.
• ⭐ Polygon: A closed 2D shape with straight sides.
• 🔢 Area Formulas:
  • Square: $A = s^2$ (where s is the side length)
  • Rectangle: $A = l \times w$ (where l is length, w is width)
  • Triangle: $A = \frac{1}{2} \times b \times h$ (where b is base, h is height)
  • Circle: $A = \pi r^2$ (where r is the radius)

✍️ Practice Quiz

1. What shape has four equal sides and four right angles?
   1. Circle
   2. Triangle
   3. Square
   4. Rectangle
2. Which shape is defined as a round figure with all points equidistant from the center?
   1. Triangle
   2. Square
   3. Rectangle
   4. Circle
3. A shape has three sides and three angles. What is it?
   1. Square
   2. Triangle
   3. Rectangle
   4. Circle
4. Which shape has four sides and four right angles, but its sides are not all equal?
   1. Square
   2. Triangle
   3. Rectangle
   4. Rhombus
5. What shape has four equal sides but its angles are not necessarily right angles?
   1. Square
   2. Rectangle
   3. Rhombus
   4. Triangle
6. A shape with many straight sides and angles is generally called a:
   1. Circle
   2. Polygon
   3. Triangle
   4. Oval
7. The area of a circle is calculated using which formula?
   1. $A = l \times w$
   2. $A = s^2$
   3. $A = \pi r^2$
   4. $A = \frac{1}{2} \times b \times h$