Which formula would be used to find the measure of angle 1?

1/2(a° + b°).

1/2(a° – c°).

1/2(b° + c°).

1/2(a° – b°).

-Answer-
D. 1/2(a° – b°).

1/2(a° + b°).

1/2(a° – c°).

1/2(b° + c°).

1/2(a° – b°).

-Answer-

D. 1/2(a° – b°).

Step-by-step explanation:

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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answer: none of these answers are correct only the second half is

step-by-step explanation: