The area of the given triangle is 20 square kilometers.
Here, we are given a triangle as shown in the figure below.
There are many ways of calculating the area of a triangle but since here, we are given only one angle and 2 sides of the triangle we will use the following formula to calculate the area-
area of triangle = 1/2 × sinФ × side 1 × side 2
where, Ф = angle formed by side 1 and side 2
Here, Ф = 35
Sin 35 = 0.5736
Thus, the area of the triangle will be-
1/2 × 0.5736 × 7 × 10
= 35 × 0.5736
= 20.076
20.076 rounded off to nearest hundredth is 20
Thus, the area of the given triangle is 20 square kilometers.
Learn more about triangles here-
https://brainly.com/question/1058720
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