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I hate maths need a quick response ​-example-1

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Answer:

30 cm

Explanation:

The triangle provided is an isosceles triangle.

Isosceles triangles have two sides of equal length.

This means 31 - 3x = 2x + 1.

We can find the value of x using this.

31 - 3x = 2x + 1

31 - 1 = 5x

30 = 5x

x = 6

The perimeter is the sum of all the sides.

(31 - 3x) + (2x + 1) + (10 - x)

Arrange like terms together

(31 + 1 + 10) + (-3x + 2x - x)

42 - 2x = perimeter

Substitute in the value of x

42 - (2 x 6) = 30

User Rajan Balana
by
8.9k points
2 votes

Answer:

isoceles triangle →31-3x=2x+1

we calculate

31-3x=2x+1

-3x-2x=1-31

-5x=-30

x= 6

perimeter : 31-3x+2x+1+10-x=

31-18+12+1+10-6=30

Explanation:

User Andrey Dolgikh
by
7.7k points

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