Question

Select the first incorrect step for finding the area of the given polygon from the following options.

• A. Step 2: Area of rectangle BEFC = 4 × 4 sq. cm
• B. All the steps are correct
• C. Step 1: Area of square ABCD = 3 × 3 sq. cm
• D. Step 3: Area of polygon AEFD = 16 sq. cm + 9 sq. cm = 27 sq. cm

Answer 1

The correct option is A Step 2: Area of rectangle BEFC = 4 × 4 sq. cm


Step 1: Area of square ABCD is:
= 3 × 3 sq cm = 9 sq. cm

Step 2: Area of rectangle BEFC is:
= 4 × 3 sq cm = 12 sq. cm

Step 3: Area of polygon AEFD
= Area of ABCD + Area of BEFC
= 9 sq. cm + 12 sq. cm
= 21 sq. cm

So, step 2 contains the first error.