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belka [17]
3 years ago
10

A,B and c lie on a straight line segment A , E and d lie on a straight line segment AB = 5cm AC= 30cm and EB = 4cm work out the

length of dDC

Mathematics
1 answer:
pav-90 [236]3 years ago
4 0
I'm not sure, I don't no
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Find the measure of each angle using the triangle sum theorem and exterior angle theorem
Paladinen [302]

(please open my photo for reference as you read, I am a visual learner/explainer so it will make the most sense that way)

So the first thing you want to do is look at the exterior angle 130°. A straight line is 180°, and every Triangle's angular sum is 180°. How I think of it is that every straight line has a mini protractor on either side. It makes it a bit easier to understand.

180 - 130 = 50

You now know that two of the angles are 50°.

You now have two of the measurements for the triangle farthest to the left.

75° and 50°

75 + 50 = 125

180 - 125 = 55

a = 55°

Now that you have all the measurements for the first triangle, let's move onto the next one.

With two measurements for the second triangle, all you need to do is find their sum and subtract that from 180 and you will have the third measurement!

50 + 60 = 110

180 - 110 = 70

b = 70°


Finally, for the last triangle, you already have two of the measurements 60° and 85°.


85 + 60 = 145

180 - 145 = 35

c = 35°


Sorry if this explanation is a bit messy, it's hard to describe certain things without a letter or some kind of name to differentiate between them verbally.


I hope this helps! <3

3 0
3 years ago
How do I solve this
Gnoma [55]

Answer:

Step-by-step explanation:

I'm sorry forgot how to exactly solve it

7 0
2 years ago
Find the area of triangle ABC. The figure is not drawn to scale.
balu736 [363]
Sin(63)=x/7
0.89100652418= x/7  > <span>0.89100652418 (7) = x/7(7)
</span><span>6.23704566932=x This is the height
</span>the area of a triangle is A=BH/2  or Base * Height /2
A= (<span>6.23704566932)(8)/2
</span>A=<span>24.9481826773 or 24.95 cm^2</span>


6 0
2 years ago
What dose 5d-10= using two word expressions
Naddik [55]
Maybe 5 multiplying or adding the value of d subtracting 10 equals 
8 0
3 years ago
Can someone please explain the steps<br> (: (: please really need help
Vanyuwa [196]

Answer:

x = 128

Step-by-step explanation:

x and 128 are vertical angles

Vertical angles are equal

x = 128

3 0
3 years ago
Read 2 more answers
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