It has all angles measuring 60°
<span>I got 18 x 18 = 324.</span>
Given:
ABC is an isosceles triangle in which AC =BC.
D and E are points on BC and AC such that CE=CD.
To prove:
Triangle ACD and BCE are congruent.
Solution:
In triangle ACD and BCE,
(Given)

(Common angle)
(Given)

In triangles ACD and BCE two corresponding sides and one included angle are congruent. So, the triangles are congruent by SAS congruence postulate.
(SAS congruence postulate)
Hence proved.
Answer: 
Step-by-step explanation:
By definition, the volume of a rectangular prism can be calculated with the following formula:

Where "l" is the length, "w" is the width and "h" is the height of the rectangular prism.
In this case, you can identify that the length, the width and the height of this rectangular prism given in the exercise, are:

Then, knowing its dimensions, you can substitute them into the formula:

Finally, evaluating, you get that the volume of that rectangular prism is:

draw an imaginary line down from the 1 dimension so you have a rectangle that is 1 by 24
area = L x w = 24 * 1 = 24 square units
now you have a triangle that is 7 at the bottom and 24 tall
area of triangle = 1/2 x base x height
so you have 1/2 * 7 * 24 which =84 square units
total area = 84 + 24 = 108 units^2
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