ΔDEF ≅ΔDFG by the postulate_

a. ASA
b. SSS
c. SAS
d. SSA

b. SSS

Step-by-step explanation:

The diagram provided shows that:

DE is congruent to DG,

EF is congruent to FG, and

DF is congruent to DF

Thus, all three sides of ∆DEF is congruent to all corresponding sides of ∆DFG. Therefore, by the Side-Side-Side Congruence Theorem, ΔDEF ≅ΔDFG.

ur mom

step-by-step explanation:

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92