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dolphi86 [110]
2 years ago
15

Please help! I just got back from vacation and we just started doing ratios I have no idea what to doooo!

Mathematics
2 answers:
vladimir1956 [14]2 years ago
6 0
1:2
because red:black = 10:20 and simplifies to 1:2
tia_tia [17]2 years ago
6 0

Answer:

D.) 1:2

Step-by-step explanation:

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Please help me..stuck on problem.
Dvinal [7]
7a
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3 years ago
How do I do this? <br><br> -2(6-r)=4
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Match the following items.
max2010maxim [7]

Answer:

1. ∠ABD = 20°.

2.  Arc AB =  140°.

3.  Arc AD =  40°.

Step-by-step explanation:

Given information: ∠ADB = 70°. BD is diameter.

According to Central angle theorem, the central angle from two chosen points A and B on the circle is always twice the inscribed angle from those two points.

By Central angle theorem,

\angle DAB=90^{\circ}

Using angle sum of property in triangle ADB we get,

\angle ADB+\angle DAB+\angle  ABD=180^{\circ}

70^{\circ}+90^{\circ}+\angle  ABD=180^{\circ}

\angle  ABD=20^{\circ}.

Draw a line segment AO.

In triangle AOD, AO=OD, so

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Using angle sum property in triangle AOD,

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\angle AOD=40^{\circ}

Therefore length of arc AD is 40°.

The angle AOD and AOB are supplementary angles.

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\angle AOB=140^{\circ}

Therefore length of arc AB is 140°.

3 0
3 years ago
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