Difficulty: Easy
Correct Answer: 16.76 cm2
Explanation:
Introduction / Context:
The area of a parallelogram equals base * corresponding altitude (perpendicular distance). This avoids any need for angles or other sides when one side and its altitude are known.
Given Data / Assumptions:
Concept / Approach:
Multiply the given base by the perpendicular distance to get area; then round to two decimal places as the options are approximate.
Step-by-Step Solution:
A = 8.06 * 2.08 = 16.7648 cm2 ≈ 16.76 cm2
Verification / Alternative check:
Units check: cm * cm = cm2; the magnitude fits between 8*2 = 16 and 8.5*2.1 ≈ 17.85, so 16.76 is sensible.
Why Other Options Are Wrong:
12.56, 14.56, 18.06, 22.56 cm2 stem from multiplying by the wrong dimension or misplacing decimals.
Common Pitfalls:
Using slanted height instead of perpendicular altitude; forgetting to align side with its corresponding altitude.
Final Answer:
16.76 cm2
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