amanperfect437
amanperfect437 amanperfect437
  • 04-03-2021
  • Mathematics
contestada

a) BCD is a straight line.
Triangle ABC is equilateral.
CE = DE
E
Not drawn
accurately
А
320
B
С
Work out the size of angle x.
(4)​

a BCD is a straight lineTriangle ABC is equilateralCE DEENot drawnaccuratelyА320BСWork out the size of angle x4 class=

Respuesta :

jimrgrant1 jimrgrant1
  • 04-03-2021

Answer:

x = 46°

Step-by-step explanation:

Since Δ ABC is equilateral then interior angles = 60°

Since CE = DE then Δ CDE is isosceles and the base angles are congruent, so

∠ ECD = [tex]\frac{180-32}{2}[/tex] = [tex]\frac{148}{2}[/tex] = 74°

BCD is a straight line, then the 3 angles on it sum to 180°, that is

60° + 74° + x = 180°

134° + x = 180° ( subtract 134° from both sides )

x = 46°

Answer Link

Otras preguntas

If you move a substance from one container to another and its volume changes, the substance is a, A. solid B. liquid C. gas D. both solid and liquid 10. for the
Which phase of the writing process involves checking the content to see if the essay is sufficiently detailed and adequately supports the thesis statement? draf
To create an image that is not harmonious, an artist could
Use the words precedent and cabinet in a sentence about the first Washington presidency
The length of one side of a square city block is 462 meters. what is the perimeter of the block
What does n equal in algebra ?
Can you describe the structure of the government set up under the articles of confederation?
6 more than five times a number x is at least 21
round 141.999 to the nearest tenth
Use the words precedent and cabinet in a sentence about the first Washington presidency