Answer:
cos A = 53.13
Step-by-step explanation:
cos =
cos A =
cos A = 0.60
cos-1 0.60 = A
53.13 = A
Hello,
Let's work in dm and dm².
Let's a the shortest side
2a+b=9
ab=10
==>2a²-9a+10=0
==>(a=5/2 and b=4) or (a=2 and b=5)
The rectangle is 25 cm * 40 cm
or 20 cm * 50 cm
Proof:
(25,40)
2*25+40=90 (cm)
25*40=1000 (cm²)
(20,50)
2*20+50=90 (cm)
20*50=1000 (cm²)
Answer:
Step-by-step explanation:
Both pairs of vertical angles formed at point E are equal. Therefore, the two triangles share two angles. If two triangles share two angles, they must also share the third angle, since the sum of the interior angles of a triangle add up to 180 degrees. Therefore, all three angles of the two triangles are equal, which is a proof of similarity.
Answer: Option D
Step-by-step explanation:
The equation of the line in slope intercept form is:
Where m is the slope and b the y-intercept.
Solve for y from both equations:
As you can see, the slopes of the lines are equal, therefore, they are parallel.
If the lines are parallel then the system of equtions has no solution.