snailtrail
snailtrail snailtrail
  • 12-04-2017
  • Mathematics
contestada

Find the area of the triangle (but identify which formula to use). Please help!

Find the area of the triangle but identify which formula to use Please help class=

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Ohpsych
Ohpsych Ohpsych
  • 12-04-2017
a.) A= (1/2)absinC
b.) sinA/a, sinB/b, sinC/c
sin100/42, sin25/b, sinC/c
use these two fractions.
sin100/42= sin25/b
cross multiply next
b×sin100= 42×sin25
then divide on both sides by sin100
b=18
c.)measurementofA+measurementofB+measurementofC=180
100+25+C=180
125+C=180
-125 -125
The measurement of angle C is 55 degrees.
d.)A=(1/2)42×18×sin55
= 21×18×sin55
A =309.6 units squared

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