The two triangles are congruent. We can prove this using SSS. The upper triangle is a mirrored copy of the lower triangle.
Since angle1 = 160 degrees, this means angle2 = 160 also. This is because the corresponding pieces of congruent triangles match up. Or you could use the second part of the hint which says "Opposite angles in a rhombus are congruent".
Let x be the measure of angle 3. For either isosceles triangle, it has congruent base angles measured x degrees. They add to the 160 degrees mentioned earlier to get a total of 180.
So 3/4 of flowers are tulips 2/3 of tulips are yellow what fraction are yellowtulips 2/3 of 3/4 are yellow tulips 'of' means mutily 2/3 times 3/4=(2 times 3)/(3 times 4)=6/12=1/2
