matylda999 matylda999
  • 25-05-2022
  • Mathematics
contestada

4.
Triangle DEF is shown below.
E
19-6 m
I
10-4 m
13-2 m
D
It has sides of length 10.4metres, 13.2metres and 19.6metres.
Calculate the size of angle EDF.

4 Triangle DEF is shown below E 196 m I 104 m 132 m D It has sides of length 104metres 132metres and 196metres Calculate the size of angle EDF class=

Respuesta :

alexanderorangeguy
alexanderorangeguy alexanderorangeguy
  • 25-05-2022

Answer:

111.75 degrees

Step-by-step explanation:

EDF = cos^-1((b²+c²-a²)/2bc)

EDF = cos^-1((10.4²+19.6²-13.2²)/2(10.4)(19.6))

EDF = 111.75 degrees

Answer Link

Otras preguntas

2. Family Survey Description: Collect data of number of family members of 10 neighbouring families and use them to find mean, mode and median. Will mark as brai
what is the probability of a week consisting of 175 hours Pls explain
An altitude of a triangle is a segment that passes through one vertex and is perpendicular to the opposite side. Find the standard form of the equation if the l
help me please(3⁴x²)³ =​
The rectangle and the square shown have the same perimeter?? What is the perimeter of each?!
What is the solution to x/3 = -12
What is 350 degrees Fahrenheit in Celsius
What are some of the thing one looks for in a good biography? Please give very long paragraph
Use the words given to make sentence using Present perfect tense twins/ loose /dogs
(4x - 3) + (3x+9) Solve this!