What is 9(x2) I don’t understand this

Mathematics

1 answer:

djverab [1.8K]4 years ago

5 0

Answer:

the answer is 9x2 the 2 is above the x though.

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In the diagram, point O is the center of the circle and mADB = 43°. If mAOB = mBOC, what is mBDC?

Vanyuwa [196]

The answer is B) 43<span>°
Angle ADB is an inscribed angle which means arc AB has an angle twice that of angle ADB. The angle of the arc would be the same as that of the central angle AOB. So, mAOB = 86</span>°. And since, mAOB = mBOC, then mBOC = 86° and arc BC has a measure of 86° as well. Angle BDC intercepts the arc BC which means half of the angle of arc BC is mBDC. So, mBDC = 43<span>°.</span>

7 0

3 years ago

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What is m<efh =(5×+1)°,m<hfg =62° and m <efg = (18×+11)°, find each measure.

Naddik [55]

Answer:

$m\angle efg=21\°\\\\m\angle hfg=62\°\\\\m\angle efg=83\°$

Step-by-step explanation:

Given:

$m\angle efh=5x+1\\m\angle hfg=62\\m\angle efg=18x+11$

Now, from the figure shown below,

The sum of angle efh and angle hfg is equal to the angle efg. This is true because of the angle addition postulate which states that when two angles are formed with the same vertex and different sides, then their sum is equal to the total angle made by both the sides at the vertex.

Here, point 'f' is the vertex and the sides are 'ef and 'fg'.

Therefore,

$m\angle efh+m\angle hfg=m\angle efg$