May 14th, 2019, 02:50 PM  #1 
Member Joined: Jan 2019 From: tornto Posts: 48 Thanks: 0  area of the arrow
Area of the arrow Determine the area of the arrow from a oneway street sign, given the dimensions below. image: What's the formula? How to solve it? Thanks. Last edited by skipjack; May 15th, 2019 at 12:48 PM. 
May 14th, 2019, 03:37 PM  #2 
Math Team Joined: Jul 2011 From: Texas Posts: 3,002 Thanks: 1588 
Area of triangle + Area of rectangle = Area of arrow

May 14th, 2019, 09:45 PM  #3 
Member Joined: Jan 2019 From: tornto Posts: 48 Thanks: 0 
beginning to the end of the arrow so 1/2 (30+30+75 * 90)= 3405? right? 
May 15th, 2019, 06:00 AM  #4 
Math Team Joined: Jul 2011 From: Texas Posts: 3,002 Thanks: 1588  
May 15th, 2019, 01:04 PM  #5 
Global Moderator Joined: Dec 2006 Posts: 20,937 Thanks: 2210 
Area(triangle) = base × height / 2 = (30 + 30 + 75) cm × (90/2) cm = 6075 cm² Area(rectangle) = 300 cm × 75 cm = 22500 cm² Total area = 28575 cm² 

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