The area of a triangle is 21ft². If the height of the triangle is 7ft, how long is the base of the triangle? Please give your answer and explain how you found it.

The answer is b = 6

Step-by-step explanation:

Area of a triangle= 1/2 × b × h

A = 21, h = 7, b = ?

21 = 1/2 × b × 7 (multiplying through)

21 = 7b/2

Cross multiply

2 × 21 = 7b

42 = 7b

b = 42/7

b = 6

b = 6ft

Step-by-step explanation:

Area of a triangle = 1/2 x base x height

Given the area = 21ft^2

Height = 7ft

Base = ?

Using the above formula

21 = 1/2 x b x 7

21 = 7b/2

Cross multiply

7b = 21 x 2

7b = 42

Divide both sides by 7

7b/7 = 42/7

b = 6ft

The length of the base is 6ft

hi there!

first we need to find out how much they are adding to each number to make the next number.

ex: 4 + 4 = 8, 8 + 8 = 16, and so on.

so continuing with 32,

32 + 32 = 64

64 + 64 = 128

128 + 128 = 256

256 + 256 = 512

4, 8, 16, 32, 64, 128, 256, 512

the 8th term of the sequence will be 512

hope this ! ~

7 9/10 as an improper fractions is 79/10.

hope it : )