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nikklg [1K]
1 year ago
13

Find the measure of a.

Mathematics
1 answer:
Kay [80]1 year ago
5 0

The measure of angle a is 70 degrees

<h3>How to determine the measure of a?</h3>

The angle in a semicircle is a right angle.

This means that:

a + d = 90

Where O is the center of the circle

From the figure, we have:

Angle d and the angle with a measure of 20 degrees are corresponding angles

This means that

d = 20

Substitute d = 20 in a + d = 90

a + 20 = 90

Subtract 20 from both sides of the equation

a = 70

Hence, the measure of angle a is 70 degrees

Read more about angles at:

brainly.com/question/25716982

#SPJ1

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Step-by-step explanation: :)

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3 years ago
What part of 3 12 is 1/2 ? I need this asap
Aliun [14]
I assume you are asking one of three things, so I will answer all of them.

if you are asking what is 1/2 of 312, then multiply 312 by 1/2. 312 is really just 312/1, so
312 \times  \frac{1}{2}  =  \frac{312}{1}  \times  \frac{1}{2}
we multiply fractions by multiplying straight across
\frac{312 \times 1}{1 \times 2}  =  \frac{312}{2}  = 156


if you were asking what part of 3 1/2 is 1/2 then we have to recognize what 3 1/2 is as an improper fraction. to do this, we convert 3 into halves. how many halves of pizza are there in 3 whole pizzas? 6. so we have 6 halves and one half, which is a total of 7 halves.
\frac{6}{2}  +  \frac{1}{2}  =  \frac{7}{2}
now, we do the same thing as the first problem
\frac{7}{2}  \times  \frac{1}{2}  =  \frac{7 \times 1}{2 \times 2}  =  \frac{7}{4}

if you were asking what is half of 3.12, then we convert 1/2 to a decimal and multiply
\frac{1}{2}  = .5 \\ 3.12 \times .5 = 1.56
6 0
3 years ago
What is 13×13&amp;12×19&amp;19×62
kumpel [21]
13*13= 169
12*19= 228
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This was very easy.
7 0
3 years ago
Read 2 more answers
How to solve this word problem
anygoal [31]
We assume that
.. (number in school)/(560 lunches sold) = (60 students sampled)/(40 eat lunch)
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8 0
3 years ago
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