In the following figure, if AB ǁ CD, then find the measure of PCD and CPD.

Explanation:

Given

See attachment

Required

Determine PCD and CPD

First, we need to calculate CPD

Since DPA is a straight line and CPA = 100;

We have that:

--- angle on a straight theorem

Substitute 100 for CPA

Subtract 100 from both sides

Next, we calculate PCD

We have that:

 --alternate angle

In triangle PCD

--- angles in a triangle

Where

So, we have:

Subtract 136 from both sides

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.