Quadrilateral ABCD is a rhombus with perimeter 52 meters. The length of diagonal is 24 meters. What is the area in square meters of rhombus ABCD?

AMC 8 2019 Problem 4

AMC8 2019 年第 4 题

四边形与多边形★★☆☆☆

Quadrilateral ABCD is a rhombus with perimeter 52 meters. The length of diagonal \overlineAC is 24 meters. What is the area in square meters of rhombus ABCD?

四边形 ABCD 是个周长为 52 米的菱形。对角线是多少平方米？

A.60
B.90
C.105
D.120
E.144

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