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3 years ago

I need help with this badly. It's geometry and angles.

Mathematics

2 answers:

lys-0071 [83]3 years ago

6 0

Answer:

∠ C = 118°

Step-by-step explanation:

DE = DF , then Δ DEF is isosceles with base angles congruent , then

∠ DEF = ∠ DFE = $\frac{180-56}{2}$ = $\frac{124}{2}$ = 62°

∠ DFE and ∠ DFB are adjacent angles on a straight line and sum to 180° , so

∠ DFB = 180° - 62° = 118°

BCDF is a parallelogram ( opposite sides are parallel )

The opposite angles of a parallelogram are congruent , then

∠ C = ∠ DFB = 118°

12345 [234]3 years ago

5 0

Ok done. Thank to me :>

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frozen [14]

Note: Consider we need to find the vertices of the triangle A'B'C'

Given:

Triangle ABC is rotated 90 degrees clockwise about the origin to create triangle A'B'C'.

Triangle A,B,C with vertices at A(-3, 6), B(2, 9), and C(1, 1).

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The vertices of the triangle A'B'C'.

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If triangle ABC is rotated 90 degrees clockwise about the origin to create triangle A'B'C', then

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4 years ago

What is the square root of 10

olga nikolaevna [1]

Answer:

3.16

Step-by-step explanation:

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3 years ago

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I need help cuz Im not good at maths

-BARSIC- [3]

Answers:

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b. 13.8 cm

Steps:

a. Solution,

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(1, 4), (2, 3), (3, 2), (4, 1)

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(1, 5), (2, 4), (3, 3), (4, 2), (5, 1)

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