Triunghiul isoscel ABC are latura [BC] situata intr un plan alfa si se proietcteaza pe plan dupa triunghiul dreptunghic DBC. Stiinda ca m(BDC)=90°, iar BD=16 cm si CD=12 cm, aflati a) cosinusul unghiului ABC

b) lungimea laturii [BC] a triunghiului ABC

it is probably the graph on the bottom right.

4 + 5 7/9= 9 7/9

step-by-step explanation:

step-by-step explanation:

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.