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3 years ago

How do I find the surface area of a cone

Mathematics

1 answer:

katen-ka-za [31]3 years ago

8 0

Find circumference and height of cone and multiply

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Given: AB || DE , AD bisects BE. Prove: ABC = DEC using the ASA postulate.

Ket [755]

Answer:

As per ASA postulate, the two triangles are congruent.

Step-by-step explanation:

We are given two triangles:

$\triangle ABC$ and $\triangle DEC$ .

AD bisects BE.

AB || DE.

Let us have a look at two properties.

1. When two lines are parallel and a line intersects both of them, then alternate angles are equal.

i.e. AB || ED and $\angle B$ and $\angle E$ are alternate angles $\Rightarrow$ $\angle B = \angle E$ .

2. When two lines are cutting each other, angles formed at the crossing of two, are known as Vertically opposite angles and they are are equal.

$\Rightarrow \angle ACB = \angle DCE$

Also, it is given that AD bisects BE.

i.e. EC = CB

1. $\angle B = \angle E$

2. EC = CB

3. $\angle ACB = \angle DCE$

So, we can in see that in $\triangle ABC$ and $\triangle DEC$ , two angles are equal and side between them is also equal to each other.

Hence, proved that $\triangle ABC$ $\cong$ $\triangle DEC$ .

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3 years ago

15 decreased by the product of a number x and 4 PLS HELP ME OMG

sergejj [24]

Answer:

4x - 15

Step-by-step explanation:

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3 years ago

Simplify. x2 + 2x - 15 x².3x

yaroslaw [1]

Use photo math it helps

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3 years ago

Please Help 2x^-3 = ?

Nesterboy [21]

2x^-3= 2/x^3
you can't multiple 2x to the power of -3 because is not correct. so you need to change the equation for it to give you an answer

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3 years ago

Read 2 more answers

Rachel ordered early learning software for her daughter from an online retailer. Each item costs

andre [41]

Answer:

60$

Step-by-step explanation:

Shipping is 7.50 and the 7 items are 52.5 total

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3 years ago