This isosceles triangle has two sides of equal length, that are longer than the length of the base, b. the perimeter of the triangle is 15.7 centimeters. the equation 2a + b 15.7 models this information if one of the longer sides is 6.3 centimeters, which is used to find the length of the base?

Assuming you're asking what b is:

Substitute and Subtract

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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b

step-by-step explanation: