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Tanya [424]
3 years ago
14

URGENT!!!!..........

Mathematics
2 answers:
NARA [144]3 years ago
6 0

Answer:

105 degrees

Step-by-step explanation:

l and m are parralel and are strait lines 180 degrees

angle 6 is corresponding to angle 2 so angle 2 is also 75 degrees

180 minus 75 equals 105 degrees

Norma-Jean [14]3 years ago
5 0
Angle 1 is 105 degrees
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In triangle abc, the perimeter is 36, and ab=ac. line ad is perpendicular to bc at the point d, and triangle abd's perimeter is
Musya8 [376]
Let x=ab=ac, and y=bc, and z=ad.

Since the perimeter of the triangle abc is 36, you have:

Perimeter of abc = 36
ab + ac + bc = 36
x + x + y = 36
(eq. 1) 2x + y = 36

The triangle is isosceles (it has two sides with equal length: ab and ac). The line perpendicular to the third side (bc) from the opposite vertex (a), divides that third side into two equal halves: the point d is the middle point of bc. This is a property of isosceles triangles, which is easily shown by similarity.

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If you prefer a less algebraic reasoning:

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ad = 30 - (36/2) = 30 - 18 = 12
4 0
3 years ago
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