Answer:
obtuse
Step-by-step explanation:
if one angle is 25 and the other 50, then the third angle is 105, because all three angles have to add up to 180. So it is a obtuse triangle.
Find the area of the parallelogram with vertices A(−1,2,3), B(0,4,6), C(1,1,2), and D(2,3,5).
cupoosta [38]
Answer:
5*sqrt3
Step-by-step explanation:
The vector AB= (0-(-1), 4-2,6-3) AB= (1,2,3)
The modul of AB is sqrt(1^2+2^2+3^2)= sqrt14
The vector AC is (1-(-1), 1-2, 2-3)= (2,-1,-1)
The modul of B is sqrt (2^2+(-1)^2+(-1)^2)= sqrt6
AB*AC= modul AB*modul AC*cosA
cosA=( 1*2+2*(-1)+3*(-1))/ sqrt14*sqrt6= -3/sqrt84=
sinB= sqrt (1- (-3/sqrt84)^2)= sqrt75/84= sqrt 25/28= 5/sqrt28
s= modul AB*modul AC*sinA= sqrt14*sqrt6* 5/ sqrt28= 5*sqrt3
THEOREM:
•<u> </u><u>Supplementary angle</u> —» The sum of two angles is equal to 180°.
ANSWER:
By supplementary angle property,
So, m∠QRS + m∠ABC = 180°
- m∠QRS + 41° = 180°
- m∠QRS = 180° - 41°
- m∠QRS = 139°
Answer:
what are we supposed to answer? im confused.. i can help i just dont know what to answer
Step-by-step explanation:
