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Rudik [331]
3 years ago
12

Correct answers only for number 31

Mathematics
1 answer:
Ivahew [28]3 years ago
6 0

base: b

height: b

A = 1/2 (b · b)   = 1/2(b²)   = b²/2

sum is  six less than area

b + b =  6 - ↔b²/2

2b = b²/2 - 6

4b = b² - 12         <em>multiplied by 2 to clear the denominator</em>

0 = b² - 4b - 12

0 = (b - 6)(b + 2)

0 = b - 6          0 = b + 2

b = 6                  b = -2 (Negative so disregard)

A = b²/2  = (6)²/2   = 36/2   = 18

Answer: 18 units²





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