A square is split into four triangles, and then three of the four triangles are shaded, as shown. If the areas of the shaded triangles are 3,4 , and 6 , as shown, what is the area of the unshaded triangle?

A.
10
B.
13
C.
15
D.
None of these
Mathematics
Competition
Math League
Exam No:2022 First Round Grades 8-9 Year:2022 Question No:26

Answer:

D

Knowledge points:

G8-9 - Geometry - Area Reasoning (Composite & Shaded Figures)

Solution:

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