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romanna [79]
3 years ago
13

What polygon is formed when 2 equilateral triangles that are congruent and share a side

Mathematics
1 answer:
zalisa [80]3 years ago
7 0

You form a rhombus.

Draw an equilateral triangle, and then mirror it around its base. All the sides are clearly equal, because they are all sides of the same equilateral triangle.

Moreover, the top and bottom angle are 60°, because they are angles of an equilateral triangle, while the left and right angles are 120, because they're 60+60 angles.

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A forestal station receives the locations of two fires, one of them in a forest located 11 Km heading N69°W from the station. Th
loris [4]

Answer:

  30.7 km

Step-by-step explanation:

The distance between the two fires can be found using the Law of Cosines. For ΔABC in which sides 'a' and 'b' are given, along with angle C, the third side is ...

  c = √(a² +b² -2ab·cos(C))

The angle measured between the two fires is ...

  180° -(69° -35°) = 146°

and the distance is ...

  c = √(11² +21² -2(11)(21)cos(146°)) ≈ √945.015

  c ≈ 30.74

The straight-line distance between the two fires is about 30.7 km.

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2 years ago
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3 years ago
One angle of a right triangle measures 10°. What is the measure of the other acute angle?
Andrei [34K]

Answer:

80 degrees

Step-by-step explanation:

Do 90 plus 10.

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Denise bought a book that cost $9.95, a set of bookmarks that cost $1.95, and a magazine that cost $4.95. What was the cost of t
Andrej [43]

Answer:16.05 $

Step-by-step explanation: Put all the numbers in a vertical format and add them all up

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                  --------

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