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A triangle is 4 cm wider than it is tall. The area is 16 cm2. Find the height and the base.

User Papadi
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2 Answers

1 vote

Final answer:

The height of the triangle is 4 cm and the base is 8 cm.

Step-by-step explanation:

In this problem, we are given that the triangle is 4 cm wider than it is tall, and the area is 16 cm2. Let's denote the height of the triangle as x cm. We can then write the base of the triangle as (x + 4) cm.

Using the formula for the area of a triangle: A = 1/2 * base * height, we can substitute in the known values: 16 = 1/2 * (x + 4) * x.

Simplifying the equation: 16 = 1/2 * (x2 + 4x).

Multiplying both sides by 2: 32 = x2 + 4x.

Combining like terms and rearranging the equation: x2 + 4x - 32 = 0.

Factoring the quadratic equation: (x - 4)(x + 8) = 0.

This gives us two possible solutions: x = 4 cm or x = -8 cm. Since we cannot have a negative height, the height of the triangle is 4 cm. The base of the triangle is (4 + 4) cm = 8 cm.

User Eirc
by
8.3k points
0 votes

height = 8cm

_______________

Step-by-step explanation:

base = 4cm

area = 16cm²

height = ?

area = 1÷2 × base × height

16cm² = 1/2 × 4cm × height

height = (2 × 16)÷4

height = 8cm

_______________

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User Paul Nathan
by
7.2k points

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