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hammer [34]
3 years ago
7

Determine the area of this triangle...

Mathematics
2 answers:
Nady [450]3 years ago
5 0

Answer:

32.5m^{2}

Step-by-step explanation:

The coloured triangle with the blank triangle area =

(14m x 6.5m)÷2 = 45.5m^{2}

The blank triangle area =

[(14-10m) x 6.5m]÷2 = 13m^{2}

Therefore:

The coloured triangle area =

(45.5 - 13)m^{2}

=32.5m^{2}

yanalaym [24]3 years ago
4 0

Answer:

650,000 cm²

Step-by-step explanation:

10x6.5=65 METERS squared.  They want it in CENTIMETERS squared.

65m² = 650,000cm²

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We assume the two numbers are x and (x+1)
so x^2+(x+1)^2=421
x^2+(x^2+2x+1)=421
2x^2+2x-420=0
According to the formula of quadratic 
x=14 or-15
cuz we know the two numbers are integers
so x=14
therefore the other number is 15
To make sure that's correct
14^2+15^2=421

Hope that helps you!!


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