Help on my geometry plzzzz

Mathematics

1 answer:

d1i1m1o1n [39]4 years ago

4 0

Which exactly ??? :)

You might be interested in

Which number line represents the solution of 1 - 2x ≥ 3

Andrew [12]

Answer:

Step-by-step explanation:

First subtract the 1 from both sides. this leaves you with a -2x on one side and a 2 on the other side. Divide the -2, and remember that when you divide a negative number, the sign in the middle flips meaning that the answer would be x is less than or equal to -1.

5 0

3 years ago

Read 2 more answers

Geometry question, need help!

Anna35 [415]

Answer:

x = 7.5

Step-by-step explanation:

We first labelled the diagram we get

DC = 8

AD = 10

CE = 6

BE = x

∴ AC =AD + DC = 18

∴ BC = BE + ED = x + 6

To Find :

BE = x =?

Solution:

Let DE || AC

In Δ ABC and Δ DEC

∠A ≅ ∠D …………..{corresponding angles ∵ DE || AB }

∠B ≅ ∠E ..............{corresponding angles ∵ DE || AB }

∠C ≅ ∠C ……….....{Reflexive Property}

Δ ABC ~ Δ DEC ….{Angle-Angle-Angle Similarity test}

If two triangles are similar then their sites are in proportion.

$\frac{AB}{DE} =\frac{BC}{EC} =\frac{AC}{CD}\ \textrm{corresponding sides of similar triangles are in proportion}\\$

On substituting the given values we get

∴ $\frac{8}{18} = \frac{6}{6+x} \\\\8(6+x) = 6\times 18\\\\\textrm{using distributive property we get}\\48+8x=108\\8x=108-48\\x=\frac{60}{8}\\ \\x=7.5\\\\\therefore x =7.5$