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Rashid [163]
3 years ago
11

An isosceles trapezoid has base angles of 45° and bases of lengths 9 and 15. The area of the trapezoid is

Mathematics
1 answer:
-BARSIC- [3]3 years ago
3 0
Tangent 45 = height / 3
height = 3 * tan (45)
height = 3 * 1
height = 3

<span>Trapezoid area = ((sum of the bases) ÷ 2) • height
</span>
<span>Trapezoid area =  (9 + 15) /2 * height

</span><span>Trapezoid area =  12 * 3

</span><span>Trapezoid area =  36


</span>

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Xelga [282]

Answer:

(a) AD=6 cm

(b) 66 cm²

(c) 38 cm

Step-by-step explanation:

(a) To get the length of AD, we can use pythagoras on the triangle part. Let's say the dotted line intersects DC at E. Then since AB and DC are parallel, AD is equal to BE. EC = 8 cm simply by subtracting AB from DC (15-7=8).

Then pythagoras says that 8²+BC²=10². So BC = √(100-64) = 6. And since BC=AD, AD is also 6.

(b) Area of the rectangle DEBA is 7*6 = 42. Area of triangle ECB is base times half height: 8*3 = 24. Sum is 42+24 = 66 cm²

(c) Perimeter is 7+10+15+6 = 38 cm. Add all the side lengths.

3 0
3 years ago
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Blababa [14]

Answer:

  see attached

Step-by-step explanation:

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In the attached diagram, the two triangles are ABC and ABD. The right angles are at vertex C and vertex B, respectively.

5 0
1 year ago
Which graph best represents the solution to 1/2x - 2 = 3
inysia [295]

Answer:

The one showing only the point (10, 3)

Or the linear plot with the point +10 highlighted.

Step-by-step explanation:

4 0
2 years ago
HELP! E
mestny [16]

Answer:

c

Step-by-step explanation:

Multiplying 49 by 1/7 in the inverse operation of dividing it by 7, so they will both get the correct answer.

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3 years ago
Isaak is writing an explicit formula to represent the sequence.
gulaghasi [49]
In a geometric progression:
a, b, c, d...
The common ratio can be obtained using:
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d/c = 343 / 196 = 1.75
The common ratio = 1.75
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2 years ago
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