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nlexa [21]
3 years ago
12

The formula for the area of a triangle Is A = -bh, in which b represents the length of the base and h

Mathematics
1 answer:
Ira Lisetskai [31]3 years ago
8 0

Step-by-step explanation:

something went very wrong with the problem description.

the area of a triangle is

base × height / 2

so, we know the area, and we know the height.

therefore

470 = base × 20 / 2 = base × 10

base = 470/10 = 47 mm

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