All categories

3 years ago

O is the center of the given circle. The measure of angle O is 128°. The diagram is not drawn to scale.

Mathematics

2 answers:

kati45 [8]3 years ago

6 0

We know that

The measure of the external angle is the semi difference of the arcs that it covers.
so
see the picture attached to better understand the problem

m AB=128°--------> by central angle
m ACB=360°-128°-----> m ACB=232°
∠x=(1/2)*[m ACB-m AB]
∠x=(1/2)*[232-128]-----> ∠x=(1/2)*104°-----> ∠x=52°

the answer is
∠ x is 52°

Xelga [282]3 years ago

6 0

The answer is 52°

Hope I helped :)

You might be interested in

Help, please show how to find x, thank you

Stells [14]

Notice the tickmark on the angles, those angles are equal to each other.

now, notice the angle at the very top, the large triangle is really sharing it with smaller-inscribed triangle, and therefore is equal on both triangles.

therefore, the larger triangle, is similar with smaller-inscribed triangle by AA.

what the dickens does that mean?

$\bf \cfrac{large}{small}\qquad \cfrac{4+5}{4}=\cfrac{5+x}{5}\implies \cfrac{9}{4}=\cfrac{5+x}{5}\implies 45=20+4x
\\\\\\
25=4x\implies \cfrac{25}{4}=x\implies 6\frac{1}{4}=x$

8 0

3 years ago

How many solutions does this equation have? a + 3 + 2a = -1 + 3a + 4

vekshin1

-8a+4 im pretty sure

4 0

3 years ago

Read 2 more answers

What is 5 3/4 -1 5/12= ?

allsm [11]

Answer:

4.33333333333 or 4 and 1/3

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

A gardener wants to know if soaking seeds in water before planting them increases the proportion of seeds that germinate. To inv

juin [17]

Answer:

d. I and III only

Step-by-step explanation:

I. The seeds should be randomly assigned to a treatment.

III. The number of successful seeds and unsuccessful seeds in each group should be at least 10.

The distribution of difference between two sample proportions :

Given :

Proportion 1 = P1 ;

Proportion 2 = P2 ;

Sample assignment for both samples 1 and 2 into the different treatment groups should be randomized, that is a simple random sampling of subjects into the treatment and control group. The sample design for difference between two sample proportions should be independent.

Finally each of the two proportions P1 and P2 should record a minimum of 10 successes and 10 non - successful Occurrences.

3 0

3 years ago

Question 20 please help

Luda [366]

I guess the answer is C or A

5 0

3 years ago