3 years ago

I need help on 16,17,18,19 please

Mathematics

1 answer:

aev [14]3 years ago

5 0

Answer:

Obtuse stb stb a ad

Step-by-step explanation:

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Prove:ABCD is a parallelogram

labwork [276]

Answer:

Given

Step-by-step explanation:

<A and <D are supplementary

7 0

2 years ago

ОЧЕНЬ СРОЧНО ПОЖАЛУЙСТА <br> Сколько серединных перпендикуляров имеет данный отрезок??

zloy xaker [14]

What did you say????????

4 0

2 years ago

I need help !!! I don’t understand the problem

Pepsi [2]

Answer:

It would be -81²x+81x-18= -9x+6

Step-by-step explanation:

When you work equation one you get 18. Then when you work equation two, you get -2/3=-0.666666667

7 0

3 years ago

How are crabs and seashells different and how are they alike give more than one reason why give at least three examples!!!!!Plea

ipn [44]

Crabs are "alive"
Seashells are just a "shell" as in the hard part of a crab is attached and part of the crab
You eat crabs but not seashells

8 0

2 years ago

I’m confused on this one

dedylja [7]

It's a parallelogram so if one angle is 90 degrees they all will be because of transverse angles and all that good stuff.

So we're given the diagonal of a rectangle and one side and we're asked to find the other. The diagonal of a rectangle is the hypotenuse of the right triangle whose legs are the sides of the rectangle. So this is a Pythagorean Theorem question in disguise:

$AB^2 + AD^2 = BD^2$

$AD^2 = BD^2 - AB^2$

$AD = \sqrt{ BD^2 - AB^2 }$

$AD = \sqrt{149^2 - 51^2} = \sqrt{19400} = 140$

Answer: 140 cm

I don't recall seeing this Pythagorean Triple before.

3 0

2 years ago