Leamers Packet Leap Week 6. Math Learning Tankt (Engagement)...
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Leamers Packet Leap Week 6. Math Learning Tankt (Engagement)...
paki answer ng maayos please...
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Answer:
Answer:For first one
<A+<B+<C=180°[sum of interior angle of a triangle is 180°]
35°+45°+<C=180°
<C=180°-75°
<C=105°
By using sine rule
Sin A/BC=SinB/AC
sin 30/10=sin45/AC
AC=sin 45°*10/sin30°
AC=10√2=14.14
AC=14.14
again
SinA/BC=SinC/AB
AB=Sin105°*10/Sin30
AB=19.3
For second one:
By using cosine rule
b²=a²+c²-2acCosB
b²=3²+9²-2*3*9*cos108°
b=
AC=10.3
Now
again
By using Sine rule
Sin B/AC=Sin A/BC
sin 108°/14.14*3=SinA
SinA=0.2018
A=Sin-¹ (0.2018}
<A=11.6°
again
<A+<B+<C=180°[sum of interior angle of a triangle is 180°]
11.6°+108°+<C=180°
<C=180°-118.6
<C=60.4°
Try like this.
not enough information