Figure abcd is a parallelogram.

which sequence could be used to prove that ad = bc?

a. first prove abc is congruent to cda, and then state ad and bc are corresponding sides of the triangles.
b. first prove abc is similar to cda, and then state ad and bc are opposite sides of the parallelograms.
c. first prove abcd is congruent to cdab, and then state ad and bc are corresponding sides of two parallelograms.
d. first prove abcd is similar to cdab, and then state ad and bc are opposite sides of the parallelograms.

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

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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