Area of Plane Figures

Area of Plane Figures - G8C9L1

Rectangle, Square, Trapezium, Rhombus, Composite figures, Circle, Sector

Objective

WWBAT COMPUTE the area of figures by combining the figures or parts of them.

WE ARE INDEPENDENT LEARNERS.

I CAN!

SELF ASSESSMENT RUBRIC

Agenda

• What exactly is area?

• Pre work discussion - 10 minsa

• Area of rectangle

• Area of square

• Area of triangle

• Area of parallelogram

What's the difference between finding length and finding area?

Length is one dimensional hence we can measure using scale/Ruler.

Area is two dimensional hence we measure in square units

Multiple Choice

What does area mean?

• the distance around a shape

• half the distance around a shape

• the amount of space outside a shape

• the amount of space inside a shape

Multiple Choice

What is the area of a rectangle with side lengths 3 inches by 5 inches?

• 15 square inches

• 16 inches

• 15 square feet

• 22 inches

Multiple Choice

What units do we measure area in?

• inch units

• square units

• centimeter units

Multiple Choice

What is the area of the shaded region of the rectangle?

• 6 square units

• 8 square units

• 9 square units

• 12 square units

Multiple Choice

Mahi drew a square. Each side measures 6 cm. What is the area of the square?

• 24 sq cm

• 36 sq cm

• 42 sq cm

• 48 sq cm

Multiple Choice

If I wanted to put tile down in my kitchen, I would need to find:

• area
• perimeter

Multiple Choice

What is the area of this figure?

• 12 sq. cm

• 32 sq. cm

• 16 sq. cm

• 28 sq. cm

Multiple Choice

If I wanted to paint a wall, that would be an example of:

• area
• perimeter

Multiple Choice

Identify the polygon.

• Triangle

• Quadrilateral

• Rectangle

• Pentagon

Multiple Choice

What do we call a shape with two pairs of parallel lines?

• A trapezoid

• A rhombus

• A ray

• A parallelogram

Multiple Choice

Cooper used his ruler to measure the side of a square, as shown.

What is the area of the square?

• 4 sq. in.

• 8 sq. in.

• 12 sq. in.

• 16 sq. in.

Multiple Choice

What is the formula for the area of a square?

• A=bh

• A=lw

• A=s²

• A=1/2(bh)

Multiple Choice

What is the formula for the area of a parallelogram?

• A= base x height

• A=length x width

• A=side x side

• A=1/2 * base * height

Multiple Choice

What is the formula for the area of a triangle

• A= base x height

• A=length x width

• A=side x side

• A=1/2 * base * height

Multiple Choice

What is the formula for the area of a rectangle

• A= base x height

• A=length x breadth

• A=side x side

• A=1/2 * base * height

Post work

Please find 3 shapes around your place and find the area for each one of them.

1. Rectangle

2. Square

3. Triangle.

Instructions

1. Click a picture

2. Find the length of the sides using scale/ruler

3. Apply the formula for area

4. Calculate

Thank you!