Answer:
900
Step-by-step explanation:
So you could do 300+200+400
Then you would add your other number like this 200+300+1 and then your goingbto get your sum
M<YZW = 63 because in an isosceles triangle, the base angles are congruent. (<X and <YZW are both base angles)
i think the answer is B, hope this helped.