Sjmarf@sh.itjust.works to People Twitter@sh.itjust.works · 3 months agoThe value of xsh.itjust.worksimagemessage-square136fedilinkarrow-up11.09Karrow-down120
arrow-up11.07Karrow-down1imageThe value of xsh.itjust.worksSjmarf@sh.itjust.works to People Twitter@sh.itjust.works · 3 months agomessage-square136fedilink
minus-squareswitchboard_pete@fedia.iolinkfedilinkarrow-up13arrow-down3·3 months agothe answers here assume that the base is a continuous, straight line given one of the angles on the left triangle is a right angle on the diagram, but 80 if you calculate it, you can’t assume that
minus-squarebrisk@aussie.zonelinkfedilinkarrow-up11arrow-down1·3 months agoThis is a standard way to draw geometric proofs, it’s not at all unreasonable to assume straight lines and unrepresentative angles.
minus-squareswitchboard_pete@fedia.iolinkfedilinkarrow-up3arrow-down2·3 months agonormally in a geometric proof, a right angle is a right angle
minus-squarebrisk@aussie.zonelinkfedilinkarrow-up17·3 months agoThis was certainly not my experience in high school. An unlabelled angle could never be assumed. Only angles marked with a square could be taken as right angles.
the answers here assume that the base is a continuous, straight line
given one of the angles on the left triangle is a right angle on the diagram, but 80 if you calculate it, you can’t assume that
This is a standard way to draw geometric proofs, it’s not at all unreasonable to assume straight lines and unrepresentative angles.
normally in a geometric proof, a right angle is a right angle
This was certainly not my experience in high school. An unlabelled angle could never be assumed. Only angles marked with a square could be taken as right angles.
guess you’re right!