Test your child: Recognizing rectangles by their features

📚 Quick Study Guide

• 📐 Definition: A rectangle is a four-sided polygon (a quadrilateral) where all four angles are right angles (90 degrees).
• 📏 Opposite Sides: Opposite sides of a rectangle are parallel and equal in length.
• 🤝 Adjacent Sides: Adjacent sides (sides next to each other) are perpendicular, meaning they form a right angle.
• diagonals are equal in length and bisect each other.
• ➕ Area: The area of a rectangle is calculated by multiplying its length ($l$) by its width ($w$): $A = l \times w$.
• 🧮 Perimeter: The perimeter of a rectangle is calculated by adding up all its sides: $P = 2l + 2w$ or $P = 2(l + w)$.
• 💡 Key Features: Look for four sides, four right angles, and opposite sides that are equal.

Practice Quiz

1. Which of the following shapes is a rectangle?
   1. A shape with three sides.
   2. A shape with four sides, four right angles, and opposite sides equal.
   3. A shape with five sides.
   4. A circle.
2. What is a key feature that distinguishes a rectangle from other quadrilaterals?
   1. Having curved sides.
   2. Having all sides of different lengths.
   3. Having four right angles.
   4. Having only acute angles.
3. If a rectangle has a length of 5 cm and a width of 3 cm, what is its area?
   1. 8 cm²
   2. 15 cm²
   3. 16 cm²
   4. 30 cm²
4. What is the perimeter of a rectangle with a length of 7 inches and a width of 2 inches?
   1. 9 inches
   2. 14 inches
   3. 18 inches
   4. 21 inches
5. Which of the following statements is true about the diagonals of a rectangle?
   1. They are of different lengths.
   2. They are perpendicular to each other.
   3. They are equal in length and bisect each other.
   4. They do not intersect.
6. A shape has four sides, and only two of its angles are right angles. Can it be a rectangle?
   1. Yes, as long as the other two angles are acute.
   2. Yes, it fits the definition of a rectangle.
   3. No, a rectangle must have four right angles.
   4. Maybe, depending on the length of the sides.
7. Which of the following is NOT a property of a rectangle?
   1. All angles are right angles.
   2. Opposite sides are parallel.
   3. All sides are equal.
   4. Diagonals bisect each other.