Trigonometry
Objective: Use trigonometry functions to find the area of triangles.
In ΔEFG, EF=5, EG=8, and m< E=22*. Find the area of ΔEFG, to the nearest tenth of a square unit.

Answer :

The area of the triangle EFG is 7.4 square units.

Explanation:

Given that the measurements of the sides of the triangle are EF = 8, EG = 8 and [tex]m\angle E=22^{\circ}[/tex]

We need to determine the area of the triangle EFG

Area of the triangle:

The area of the triangle EFG can be determined using the formula,

[tex]\text {Area}=\frac{1}{2} fg \sin E[/tex]

Substituting the values, we get,

[tex]\text {Area}=\frac{1}{2} (5)(8) \sin 22^{\circ}[/tex]

Simplifying the values, we have,

[tex]\text {Area}=\frac{1}{2}(40)(0.37)[/tex]

Multiplying, we get,

[tex]\text {Area}=\frac{14.8}{2}[/tex]

Dividing, we get,

[tex]\text {Area}=7.4[/tex]

Hence, the area of the triangle EFG is 7.4 square units.

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