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Find the height of a triangle with an area [tex]\([A]\)[/tex] of 35 square inches and base [tex]\([b]\)[/tex] of 7 inches. Use the formula for the area of a triangle, [tex]\[A = \frac{1}{2} b h\][/tex].

A. 490 inches
B. 2.5 inches
C. 10 inches
D. 122.5 inches


Sagot :

To find the height of a triangle given its area and base, we can use the formula for the area of a triangle:

[tex]\[ A = \frac{1}{2} b h \][/tex]

Here, [tex]\(A\)[/tex] is the area of the triangle, [tex]\(b\)[/tex] is the base, and [tex]\(h\)[/tex] is the height. We need to solve for the height [tex]\(h\)[/tex].

Given:
- The area [tex]\(A\)[/tex] is 35 square inches.
- The base [tex]\(b\)[/tex] is 7 inches.

Step-by-step, we need to rearrange the formula to solve for the height [tex]\(h\)[/tex]:

1. Start with the area formula:
[tex]\[ A = \frac{1}{2} b h \][/tex]

2. Substitute the known values of [tex]\(A\)[/tex] and [tex]\(b\)[/tex] into the formula:
[tex]\[ 35 = \frac{1}{2} \times 7 \times h \][/tex]

3. Simplify the equation by multiplying:
[tex]\[ 35 = \frac{7}{2} \times h \][/tex]

4. To isolate [tex]\(h\)[/tex], multiply both sides of the equation by 2 to get rid of the fraction:
[tex]\[ 2 \times 35 = 7 \times h \][/tex]

5. This simplifies to:
[tex]\[ 70 = 7 \times h \][/tex]

6. Finally, solve for [tex]\(h\)[/tex] by dividing both sides of the equation by 7:
[tex]\[ h = \frac{70}{7} \][/tex]

7. Perform the division:
[tex]\[ h = 10 \][/tex]

Therefore, the height of the triangle is [tex]\(10\)[/tex] inches.

So, the correct answer is:
[tex]\[ 10 \text{ inches} \][/tex]