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Example1

Title: Geometry

Grade Lesson s4-p1

Explanation: The best way to understand PSAT-4 is by looking at some examples. Take turns and read each example for easy understanding.

Examples

Topics → Definition Example1 Example2 Example3

Find the area of an equilateral triangle of side 12 cm \$\sqrt(3) = 1.732\$.

Step: 1

Given the side of a triangle = 12cm.

Area of an equilateral triangle = \$\sqrt(3)/4 a^2\$ square units.

⇒ \$\sqrt(3)/4 \times 12 \times 12\$

⇒ \$\sqrt(3)/4 \times 144\$

⇒ \$\sqrt(3) / \cancel(4) \times \cancel(144)^ (36)\$

⇒ \$1.732 \times 36\$

⇒ 62.35 square cm

Explanation:

If the side of an equilateral triangle is 12cm, then the area of an equilateral triangle is 62.35 square cm.